WO2002103368A1 - Silicon device - Google Patents
Silicon device Download PDFInfo
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- WO2002103368A1 WO2002103368A1 PCT/JP2001/004987 JP0104987W WO02103368A1 WO 2002103368 A1 WO2002103368 A1 WO 2002103368A1 JP 0104987 W JP0104987 W JP 0104987W WO 02103368 A1 WO02103368 A1 WO 02103368A1
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- WO
- WIPO (PCT)
- Prior art keywords
- silicon
- insulating substrate
- cantilever
- shaped structure
- silicon device
- Prior art date
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 170
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 164
- 239000010703 silicon Substances 0.000 title claims abstract description 164
- 239000000758 substrate Substances 0.000 claims abstract description 202
- 230000001133 acceleration Effects 0.000 claims description 35
- 238000005530 etching Methods 0.000 abstract description 45
- 238000001312 dry etching Methods 0.000 abstract description 12
- 238000013461 design Methods 0.000 abstract description 6
- 239000011521 glass Substances 0.000 description 48
- 238000000034 method Methods 0.000 description 33
- 238000001020 plasma etching Methods 0.000 description 18
- 230000003628 erosive effect Effects 0.000 description 11
- 239000011651 chromium Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 239000011800 void material Substances 0.000 description 8
- 238000000206 photolithography Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- 238000000605 extraction Methods 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005488 sandblasting Methods 0.000 description 2
- 238000001039 wet etching Methods 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 210000001520 comb Anatomy 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000708 deep reactive-ion etching Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 238000009616 inductively coupled plasma Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000005459 micromachining Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- ABTOQLMXBSRXSM-UHFFFAOYSA-N silicon tetrafluoride Chemical compound F[Si](F)(F)F ABTOQLMXBSRXSM-UHFFFAOYSA-N 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices adapted for rectifying, amplifying, oscillating or switching, or capacitors or resistors with at least one potential-jump barrier or surface barrier, e.g. PN junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/66—Types of semiconductor device ; Multistep manufacturing processes therefor
- H01L29/84—Types of semiconductor device ; Multistep manufacturing processes therefor controllable by variation of applied mechanical force, e.g. of pressure
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C19/00—Gyroscopes; Turn-sensitive devices using vibrating masses; Turn-sensitive devices without moving masses; Measuring angular rate using gyroscopic effects
- G01C19/56—Turn-sensitive devices using vibrating masses, e.g. vibratory angular rate sensors based on Coriolis forces
- G01C19/5719—Turn-sensitive devices using vibrating masses, e.g. vibratory angular rate sensors based on Coriolis forces using planar vibrating masses driven in a translation vibration along an axis
- G01C19/5733—Structural details or topology
- G01C19/5755—Structural details or topology the devices having a single sensing mass
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P1/00—Details of instruments
- G01P1/02—Housings
- G01P1/023—Housings for acceleration measuring devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
- G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
- G01P15/0802—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
- G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
- G01P15/125—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values by capacitive pick-up
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P15/00—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
- G01P15/02—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses
- G01P15/08—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values
- G01P2015/0805—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values being provided with a particular type of spring-mass-system for defining the displacement of a seismic mass due to an external acceleration
- G01P2015/0808—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values being provided with a particular type of spring-mass-system for defining the displacement of a seismic mass due to an external acceleration for defining in-plane movement of the mass, i.e. movement of the mass in the plane of the substrate
- G01P2015/0811—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values being provided with a particular type of spring-mass-system for defining the displacement of a seismic mass due to an external acceleration for defining in-plane movement of the mass, i.e. movement of the mass in the plane of the substrate for one single degree of freedom of movement of the mass
- G01P2015/0814—Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration by making use of inertia forces using solid seismic masses with conversion into electric or magnetic values being provided with a particular type of spring-mass-system for defining the displacement of a seismic mass due to an external acceleration for defining in-plane movement of the mass, i.e. movement of the mass in the plane of the substrate for one single degree of freedom of movement of the mass for translational movement of the mass, e.g. shuttle type
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
- Y10T428/24612—Composite web or sheet
Definitions
- the present invention relates to a silicon device used for an inertial force sensor or the like, which relates to a silicon device including an insulating substrate and a silicon beam-shaped structure formed on the insulating substrate.
- ICP-RIE method reactive ion etching technology
- ICP inductively coupled plasma
- the ICP-RIE method is a dry etching method, there is no etching anisotropy. For this reason, the ICP-RIE method has an advantage over the wet etching method in that the degree of freedom in design of the structure is significantly increased.
- Silicon cantilever ⁇ Inertial forces such as acceleration sensors ⁇ angular velocity sensors etc., which have a structure in which a silicon beam-like structure such as a doubly supported beam is supported on an insulating substrate such as glass
- ICP-RIE method there are the following problems.
- Fig. 12 shows the structure of the inertial force sensor 100 as an example of the basic structure of a conventional silicon device
- Figs. 13A to 13 show the conventional manufacturing process of the inertial force sensor 100. Shown in F.
- a similar production method is described in, for example, the following literature. Z. Xiao et al., Proc. Of Transducers 99, pp. 1518-1521, S. Kobayashi et. al., Pro of Transducers' 99, pp. 910-913.
- FIG. 12 is a schematic plan view
- FIG. 13F is a cross-sectional view taken along line ⁇ — ⁇ ′ of FIG.
- the inertial force sensor 100 is composed of an insulator substrate 101 having a concave portion 102 on its surface, and a silicon beam-shaped structure 100 bonded to the surface of the insulating substrate 101 so as to sandwich the concave portion. And a frame body 108 which surrounds the silicon beam-shaped structure 104 at a distance and is joined to the insulating substrate 101. Further, the beam-like structure 104 includes two electrode portions 105 and 105 '.
- the electrode portions 105 and 105 ' are respectively composed of a support portion 106 and a plurality of cantilever beams 107, and a support portion 106' and a plurality of cantilever beams 107, respectively.
- the cantilevers 107 and 107 are arranged so as to face each other with a small gap therebetween.
- FIG. 13D shows a step of preparing a silicon substrate 103
- FIG. 13B shows a step of preparing a glass substrate 101
- Fig. 13C shows that a mask layer is formed on the surface of the glass substrate 101 by photolithography, and then the surface of the glass substrate 101 is exposed to a few tens of m / s to several tens / This shows a step of forming a concave portion 102 by etching about m.
- FIG. 13D shows a step of bonding the silicon substrate 103 to the surface of the glass substrate 101 by the anodic bonding method.
- FIG. 13E shows a step of forming a mask layer 109 corresponding to the shape of the plan view of the beam-shaped structure 104 of FIG.
- FIG. 13F shows a step of etching the silicon substrate 103 by ICP-RIE until the silicon substrate 103 is penetrated to form a beam-shaped structure 104 and a frame 108 having a silicon structure. After that, the resist remaining on the surface of the silicon substrate is removed.
- the mask layer 109 shown in FIG. 13E generally has a wide opening and a narrow opening. Therefore, when the silicon substrate 103 having the mask layer 109 is etched by dry etching such as the ICP-RIE method, the silicon substrate having the wide opening is narrow due to the microloading effect. Etching is faster than the silicon substrate in the opening. Therefore, in the silicon substrate 103, an opening having a large opening width penetrates faster than an opening having a narrow opening width. At this time, the recessed part 102 of the glass substrate 101 and the part An etching gas intrudes into the space between the back surface and the back surface.
- This penetrated etching gas erodes the back surface of the silicon substrate 103 until the opening having the narrowest opening width is completely penetrated, and as a result, the side wall and the cantilever 10 of the support 106 are formed. The bottom and side walls of 7 are eroded. As a result, a large deviation from the design value occurs in the dimensions of the beam-shaped structure 104, and the desired characteristics cannot be obtained as a device, and if the reliability is reduced, there has been a problem of radiation.
- the cause of the problem is that the concave portion of the insulating substrate is charged to a positive charge by the etching gas having a positive charge, and the conductive film electrically connected to the support portion.
- a method for suppressing the erosion of the silicon beam-like structure by providing a hole in the recess (M. Chabloz, J. Jiao, Y. Yoshida, ⁇ . Matsuura, ⁇ . Tsutsmi, A Method to Evade Microloading) Effect in Deep Reactive Ion Etching for Anodically Bonded Glass-Silicon Structures, Proc. MEMS2000, pp.283-287, yazaki, Japan, 2000). In order to improve reliability and reliability, further erosion of silicon beam structures is needed.
- the aperture width is set to be the same to prevent the cycloloading effect, there is a problem that the degree of freedom in designing the device structure is remarkably reduced.
- the force of the cantilever of the movable electrode and the force of the cantilever of the fixed electrode are opposed to each other via a small gap, and the small gap alternately becomes wider and narrower. It is formed to repeat.
- the sensitivity of the sensor improves as the ratio of the gap distance in the wide area to the gap distance in the narrow area increases.
- the microloading effect causes the in-plane distribution of the etching rate to be more non-uniform, and the etching rate in the narrow gap region decreases. For this reason, over-etching is required in the narrow gap region, and the back surface of the silicon substrate is greatly damaged during the etching.
- an object of the present invention is to suppress the erosion of a silicon beam-like structure due to the microloading effect, thereby achieving higher reliability and improving the device structure.
- An object of the present invention is to provide a silicon device having design freedom. Disclosure of the invention
- the silicon device comprises: an insulating substrate; a silicon beam-shaped structure joined by providing a gap between the insulating substrate; A silicon frame joined to the substrate, wherein the beam-shaped structure comprises: a supporting portion joined to the insulating substrate; and at least one piece formed integrally with the supporting portion and projecting into the gap.
- the mechanism of dry etching of a silicon substrate is that activated ions having a positive charge are accelerated by a negative bias formed immediately above the silicon substrate, and collide with the silicon substrate with sufficient energy.
- the activated etching gas is usually sulfur fluoride ion (SFx + ). This reacts with silicon to form silicon fluoride (SiFx), which is released to the outside.
- the negative bias directly above the silicon substrate is formed by applying a high frequency to a substrate holder also serving as a cathode on which the silicon substrate is installed.
- the cause of the erosion of the back surface of the silicon substrate is that SFx + penetrating into the gap between the back surface of the silicon substrate and the concave portion of the insulating substrate is recoiled on the insulating substrate surface and collides with the back surface of the silicon substrate.
- the recoil of SFx + generated on the insulating substrate surface may be due to electrical repulsion besides kinetic scattering.
- FIGS. 9A and 9B are schematic cross-sectional views showing a silicon substrate 53 joined to the surface of an insulating substrate 51 having a concave portion so as to sandwich the concave portion 52.
- the silicon substrate 53 is dry-etched. It shows the state that is being done.
- a mask layer 59 for forming a functional portion is formed on the surface of the silicon substrate 53.
- the silicon substrate 53 is dry-etched into a silicon beam-shaped structure 56 and a frame 58, and the silicon beam-shaped structure 56 is further provided with a movable electrode portion 57 and a fixed electrode portion 5. 7 '.
- the movable electrode section 57 is composed of cantilevers 57 2, 57 2 and a supporting section 57 1 supporting the cantilever, and the fixed electrode section 5 T is a cantilever. 5 7 2 ', 5 7 2' and its pieces The supporting part 5 7 1 supports the beam.
- the surface of the concave portion 52 of the insulating substrate 51 is charged to a positive charge 62 by an etching gas, for example, SFx + 61, which repeatedly strikes.
- the surface of the positively charged concave portion 52 rejects the next coming SFx + 61.
- the SFx + 61 subjected to the repulsive force changes its movement direction before reaching the concave portion 52, and strikes the back surface of the silicon substrate 53 to erode the cantilever beams 572, 572 '.
- the SFx + 61 force which should normally be incident perpendicular to the insulating substrate 51, has its surface bent by the positively charged concave portion 52, and the side walls of the supporting portions 571, 571 ' It is also conceivable that erosion may occur due to collisions with the sea. Therefore, in order to suppress erosion of the back surface of the silicon substrate 53 or the support portions 571 and 571 ′, it is effective to prevent the surface of the concave portion 52 of the insulating substrate 51 from being positively charged. Means.
- FIGS. 10A and 10B are schematic cross-sectional views showing the structure of the silicon device according to the proposal of M. Chabloz et al., Which is electrically connected to the supporting portion 571 through the conducting portion 55a. It has the same structure as that of FIG. 9A except that a conductive film 54 to be conducted is provided on the surface of the concave portion. When the etching gas 61 collides with the conductive film 54, the charge leaks through the supporting portion 571, and is inactivated. At the time of dry etching, the silicon substrate 51 has the same potential as a substrate holder (not shown) and is kept at a negative potential.
- the cantilever 572 ′ was smaller than the cantilever 572. This is because the positive charge 62 that has moved from the conductive film 54 through the support part 571 charges the cantilever 572 positively, so that etching that passes near the cantilever 572 is performed. It is considered that the gas receives the repulsion and collides with the cantilever beam 5 7 2 ′ to erode.
- the damage caused by the charge of the silicon cantilever is smaller than the damage caused by the charge of the insulating substrate.However, depending on the mask pattern, the root of the cantilever may be damaged, resulting in lower reliability. May bring.
- a conductive film 54 electrically connected to the frame 58 through the conductive portion 55 b is provided on the surface of the concave portion. ing. Since the frame 58 is bonded to the insulating substrate 51 at a distance from the silicon beam-shaped structure 54, the positive charges from the conductive film 54 do not move to the cantilever. In addition, there is no microstructure such as a cantilever that requires processing accuracy near the frame 58. Therefore, even if the frame 58 is charged, these microstructures are not damaged.
- the frame 58 is connected to the frame of the adjacent device until the wafer process is completed and the device is divided into individual devices by dicing, and the frame 58 has the largest volume as an independent silicon structure in the wafer. Have. Therefore, the charge per volume (volume charge density) can be minimized as compared with the case where the silicon structure is connected to another silicon structure in the wafer. As a result, it is possible to minimize the generation of repulsive force with respect to the etching gas passing through the vicinity, and it is possible to further suppress the erosion of silicon by the etching gas on the beam-shaped structure.
- a silicon device as the beam-like structure, a device composed of two or more functional units which are electrically separated and have substantially the same volume can be used.
- a silicon device includes: an insulating substrate; a silicon beam-shaped structure joined by providing a gap between the insulating substrate; A silicon frame joined to the insulating substrate; and the beam-like structure comprises a movable electrode portion and a fixed electrode portion, and the movable electrode portion and the fixed electrode portion are each formed of an insulating substrate. And a comb-shaped electrode portion formed of a plurality of cantilevered electrodes integrally formed with the support portion and projecting into the gap, and the movable electrode portion and the fixed electrode portion are cantilevered.
- an electrically conductive film is formed on at least the surface of an insulating substrate directly under a cantilever, electrically conducting with a frame.
- a movable electrode portion and a fixed electrode portion having substantially the same volume can be used.
- a silicon device includes: an insulating substrate; a silicon beam-shaped structure joined by providing a gap between the insulating substrate; And a silicon frame joined to the insulating substrate, wherein each of the beam-shaped structures has a comb-shaped electrode portion composed of a plurality of cantilevered electrodes protruding into the void portion.
- Angular velocity sensor in which the cantilever of the electrode portion and the fixed electrode portion are disposed so as to face each other with a small gap therebetween, and is electrically connected to the frame, and at least the insulating substrate immediately below the cantilever Is an angular velocity sensor having a conductive film formed on the surface of the sensor.
- a silicon device includes: an insulating substrate; a silicon beam-shaped structure joined by providing a gap between the insulating substrate; A silicon frame joined to the insulating substrate; and a beam-shaped structure, a support portion joined to the insulating substrate, and at least one cantilever formed integrally with the support portion and projecting into the gap.
- a silicon device having at least one functional part consisting of a beam a silicon beam-like structure is composed of two or more functional parts which are electrically separated and have different volumes, and a support part of a functional part having the largest volume.
- a conductive film formed at least on the surface of the insulating substrate immediately below the cantilever.
- the volume charge density can be minimized among the functional units. As a result, it is possible to minimize the generation of repulsive force with respect to the etching gas passing through the vicinity, and it is possible to further suppress the erosion of silicon by the etching gas on the beam-shaped structure.
- the silicon device includes: an insulating substrate; a silicon beam-shaped structure joined by providing a gap between the insulating substrate; And a silicon frame joined to the insulating substrate, and the beam-like structure comprises a movable electrode portion and a fixed electrode portion, and the movable electrode portion and the fixed electrode portion are respectively made of insulating material.
- a movable electrode part and a fixed electrode part each having a support part joined to the substrate and a comb-shaped electrode part formed of a plurality of cantilever electrodes integrally formed with the support part and protruding into a gap part;
- the movable electrode portion and the fixed electrode portion are formed so as to have different volumes.
- the larger support At least an acceleration sensor having a conductive film formed on the surface of an insulating substrate directly under the cantilever.
- the silicon device of the present invention uses a silicon wafer as a silicon substrate.
- it can be manufactured by separating a large number of formed silicon devices into individual silicon devices by dicing.
- a silicon beam-shaped structure joined by providing a gap between an insulating substrate and the insulating substrate, and the beam-shaped structure separated and surrounded and joined to the insulating substrate
- a beam-shaped structure comprising: a supporting portion joined to the insulating substrate; and at least one cantilever beam integrally formed with the supporting portion and projecting into the gap.
- a conductive film is formed on at least a surface of a void located immediately below a cantilever, and the conductive film is formed on a surface around the void.
- Etching the surface of the support Forming a silicon substrate having a supporting portion and an insulating substrate having a conductive film so that the front surfaces face each other; and forming a cantilever beam on the back surface of the bonded silicon substrate.
- FIG. 1 is a schematic exploded perspective view showing the entire structure of the acceleration sensor according to Embodiment 1 of the present invention.
- FIG. 2 is a diagram showing a structure of the acceleration sensor according to Embodiment 1 of the present invention, and is a plan view in which a beam-like structure is extracted.
- FIG. 3A to 3K are schematic cross-sectional views showing manufacturing steps of the acceleration sensor according to Embodiment 1, and FIG. 3K is a cross-sectional view taken along the line II-II of FIG.
- FIG. 4 is a schematic exploded perspective view showing the structure of the acceleration sensor according to Embodiment 2 of the present invention.
- FIG. 5 is a schematic exploded perspective view showing the structure of the acceleration sensor according to Embodiment 3 of the present invention.
- 6A to 6I are schematic cross-sectional views showing manufacturing steps of the acceleration sensor according to Embodiment 3, and FIG. 6I is a cross-sectional view taken along the line VI-VI 'of FIG.
- FIG. 7 is an exploded perspective view showing the structure of the angular velocity sensor according to Embodiment 4 of the present invention.
- FIG. 8 is a diagram showing the structure of the angular velocity sensor according to the fourth embodiment.
- 9A and 9B are diagrams (part 1) illustrating the operation principle of the present invention.
- FIG. 10A and FIG. 10B are diagrams (part 2) illustrating the operation principle of the present invention.
- FIG. 11A and FIG. 11B are diagrams (part 3) illustrating the operation principle of the present invention.
- FIG. 12 is a diagram showing a structure of a conventional silicon device, and is a plan view in which a beam-like structure having a basic structure is extracted.
- FIG. 13F to 13F are schematic cross-sectional views showing the manufacturing process of the silicon device in FIG. 12, and FIG. 13F is a cross-sectional view along the line ⁇ - ⁇ ′ in FIG. BEST MODE FOR CARRYING OUT THE INVENTION
- the acceleration sensor 1 has a silicon beam-shaped structure 21a, a lower glass substrate 2 having a concave portion 3 forming a void portion on the surface, and a concave portion 7 on the surface. It consists of an upper glass substrate 6.
- the acceleration sensor 1 has a structure in which the beam-like structure 21a is joined to the lower glass substrate 2 and the upper glass substrate 6 so that the concave portion 3 and the concave portion 7 face each other.
- Sensor 1 is hermetically sealed.
- the electrode extraction portion 9 for external circuit connection on the glass substrate 6 through the substrate, 1 a 0, the electrode extraction portion 9, 1 0 beam-like structure 2 1 a of the metal electrode 1 3 , And 14 are in electrical contact with each other.
- the beam-shaped structure 21a is composed of two functional parts, a movable electrode part 22a and fixed electrode parts 23a and 23a.
- the conductive film 4 is formed on the entire surface of the concave portion 3 of the lower glass substrate 2, and a part thereof extends to a surface around the concave portion 3, and a conductive portion 5 a for ensuring conduction with the frame 24 a. Is composed.
- the conductive part 5a is a frame It is joined to the lower glass substrate 2 so as to be directly below 24 a.
- the movable electrode portions 22 a are arranged at equal intervals on both sides in the longitudinal direction of the base portion 27 a, and a plurality of cantilever beams 2 projecting from the base portion 27 a onto the recess 3.
- One 28a, 28a, and the stoppers 28a, 28a for impact resistance are connected to the comb-shaped electrode part 25a and the stoppers 28a, 28a for impact resistance.
- the beam portions 29a and 29a of the book, and the support portions 30a and 30a that support the beam portions 29a and 29a and are joined to the lower glass substrate 2, Are integrally formed.
- the impact-resistant stopper 28a also has an effect of preventing the beams 29a and 29a and the comb-shaped electrode portions 25a and 25a from being damaged by a strong impact.
- the fixed electrode portions 2 3 8 and 2 3 a ′ extend over the concave portion 3 so as to face the plurality of cantilever beams 26 a of the comb-shaped electrode portion 25 a via a minute gap. It has a comb-shaped electrode portion 31 composed of a plurality of cantilever beams 31a arranged. Further, the fixed electrode part 23 a is joined to the lower glass substrate 2 via a support part 32 a supporting the comb-shaped electrode part 31 and also serving as a base, and the fixed electrode part 23 a ′ is The lower electrode substrate 31 is joined to the lower glass substrate 2 via a supporting portion 34a which supports and also serves as a base.
- a metal film 8 is formed in the concave portion 7 of the upper glass substrate 6.
- the metal film 8 adheres (sticking) to the movable electrode 22 already formed (sticking).
- the direction of the acceleration detected by the present sensor is the direction of arrow A in the plane of the silicon substrate.
- the comb-shaped electrode portions 25a, 25a and the comb-shaped electrode portions 31, 31, which are composed of a plurality of cantilever beams, are provided within a limited sensor area and have an electrode proportional to the capacitance change. This contributes to increasing the facing area as much as possible.
- the base 27 a of the movable electrode 22 a is displaced in the direction of the arrow A (the main axis direction), and the cantilever 26 a of the comb electrode 25 a and the comb electrode 3 1
- the spacing of the cantilever 3 1 a changes. This change in spacing results in a change in capacitance.
- This change in capacitance is output as a voltage proportional to the acceleration via a C-V converter outside the sensor.
- the comb-shaped electrode Since the differential system detection is performed by using two combinations of the units, that is, two pairs of 25a and 31, it is possible to enhance the output linearity ⁇ t.
- FIGS. 3A to 13K an example of a method of manufacturing the acceleration sensor according to the present embodiment will be described with reference to FIGS. 3A to 13K.
- the surface of the silicon substrate is added to form a support for the beam-shaped structure, and in the steps shown in FIGS. 3E to 3H, the lower glass substrate is electrically conductive. A film is formed.
- the silicon substrate and the lower glass substrate are joined in the steps shown in FIGS. 3I to 3K, and the silicon substrate is further processed to form a comb-shaped electrode portion of the beam-shaped structure.
- the processed upper glass substrate is bonded onto the beam-shaped structure, an electrode extraction portion is formed on the upper glass substrate, and then separated into individual acceleration sensors by dicing, corresponding to FIG.
- an acceleration sensor having the structure described above is manufactured.
- the surface of the silicon substrate refers to the surface on the side to be bonded to the lower glass substrate.
- a silicon substrate 20 (thickness: 400 m), which is a silicon wafer having a l / m thermal oxide film 33 on its surface, is prepared.
- the thermal oxide film 33 on one surface of the silicon substrate 20 is removed with buffered hydrofluoric acid.
- a first mask layer 35 made of a resist according to the shape of the supporting portion is formed by photolithography.
- the silicon substrate 20 having the first mask layer 35 is etched to a depth of 250 ⁇ by dry etching by the ICP-RIE method. After that, the resist remaining on the surface is removed to form a frame 24a, a support 32a, and a shock-resistant stopper 28a.
- a lower glass substrate 2 (thickness: 400 // m) is prepared.
- the surface of the lower glass substrate 2 is photoengraved to form a mask layer 12 made of a resist for forming concave portions.
- hydrofluoric acid 1 hydrofluoric acid 1
- the surface of the lower glass substrate 2 is etched by 20 ⁇ with the 0% aqueous solution to form the concave portion 3.
- the recess 3 forms a void when the silicon substrate 20 and the lower glass substrate 2 are joined.
- a Cr film is formed by photolithography in the step shown in FIG. 3 ⁇ , and the conductive film made of Cr extends over the entire surface of the concave portion 3 and a part of the peripheral surface of the concave portion 3.
- the conductive film 4 is formed.
- the conductive film 4 extending to a part of the periphery of the concave portion 3 forms a conductive portion 5a that is electrically connected to the silicon substrate 20.
- the surface of the lower glass substrate 2 and the surface of the silicon substrate 20 are joined using an anodic bonding method.
- the portion of the support portion 34a located directly above the conductive portion 5a has been etched and removed in advance in the step shown in FIG. 3D, and the conductive portion 5a has contact with the support portion 34a. It is joined to the frame 24a without performing.
- the back surface of the silicon substrate 20 is photoengraved to form a second mask layer 35 made of a resist.
- a thermal oxide film mask 33 ' is formed by an electron cyclotron resonance reactive ion etching method (hereinafter abbreviated as ECR-RIE method).
- the back surface of the silicon substrate 20 is at least 150 / in by ICP-RIE. Etch to a depth of.
- the silicon substrate 20 is penetrated to form the movable electrode part 22 a, the fixed electrode part 23 a, and the frame 24 a.
- the cantilever 26 a of the movable electrode part 2 2 a and the cantilever 31 a of the fixed electrode part 23 a are opposed to each other with a small gap therebetween, and the small gaps alternate. It is formed to repeat wide and narrow.
- the thermal oxide film 33 remaining on the back surface of the silicon substrate 20 is removed by ECR-RIE. Note that the etching depth of 150 ⁇ m can be obtained by subtracting the etching depth of 250 ⁇ in the step shown in FIG. 3D from the thickness of the silicon substrate 20 of 400 ⁇ .
- a concave portion 7 having a depth of 20 / im is formed by the same method as shown in FIGS.
- a Cr film is formed on the surface of the concave portion 7 by photolithography to form a staking prevention film 8 made of Cr.
- an electrode lead portion 10 composed of a through hole is provided by sandblasting.
- the back surface of the silicon substrate 20 and the surface of the upper glass substrate 6 are joined by anodic bonding, and an electrode film made of Pt is formed in the electrode lead portion 10.
- the acceleration sensor 1 is separated by dicing the wafer.
- the conductive film 4 electrically connected to the frame body 24a has a concave portion when the movable electrode portion 22a, the fixed electrode portion 23a and the like are formed by using the ICP-RIE method. Acts as an antistatic film that prevents the surface of 3 from being positively charged. That is, it has a positive charge
- the etching gas that collides with the conductive film 4 during dry etching. At that time, the positive charge of the etching gas leaks through the conductive film 4 and the frame 24a, and the charge is neutralized by the negative potential of the frame 24a.
- the etching gas having a positive charge does not receive the electric repulsive force of the concave portion 3 and hit the surface of the silicon substrate, the comb-shaped electrode portions 25 a, 31 ⁇ ⁇ impact stoppers 28 a, 2 8a and the side walls of the support portions 32a and 34a are not eroded.
- the support portions 32a and 3 are provided between the frame body 24a and the microstructures requiring high precision, such as the comb-shaped electrode portions 25a and 31 and the beam portions 29a.
- the support portions 32a and 3 are provided between the frame body 24a and the microstructures requiring high precision, such as the comb-shaped electrode portions 25a and 31 and the beam portions 29a. 4a is located. Therefore, even if the frame body 24a is positively charged, the microstructure is damaged only by damage to the support parts 32a and 34a, which are not required to be very accurate. There is nothing.
- the frames of the adjacent sensors are continuous. Therefore, it has the largest volume among silicon structures including a beam-like structure and a frame inside a wafer. Therefore, even if the frame is positively charged, the volume charge density is minimized in the wafer. This makes it possible to minimize the generation of repulsion even if the etching gas passes near the frame.
- the gap between the plurality of cantilever beams of the comb-shaped electrode portion is formed with high accuracy, and the weight of the movable electrode portion and the fixed electrode portion can be controlled to a desired value. Therefore, there is a feature that the sensitivity of the sensor is reduced and the variation in the characteristics of each sensor is small.
- Examples of a conductive material that can be used for the conductive film used in the acceleration sensor according to the present embodiment include vaporizable metals such as chromium, aluminum, nickel, tantalum, platinum, nickel, and gold. Chromium, which has excellent adhesion to the substrate, is preferred. Also, if transparency is required for visible light inside the sensor, conductive and transparent indium tin oxide (ITO) is also applicable.
- the thickness of the conductive film is 10 ⁇ ⁇ ! 11 ⁇ m, preferably 200 nm to 500 nm. If the thickness is less than 10 nm, the durability during the reactive etching is not sufficient, and if it exceeds ⁇ , it takes a long time to form a film.
- the insulating substrate any insulator can be used as long as it can be processed into a desired shape, but a glass substrate is preferable.
- a concave portion is provided in the lower glass substrate and the concave portion serves as a gap between the lower glass substrate and the silicon substrate.
- the silicon device according to the present embodiment has the same configuration as that of the first embodiment except that the volumes of the movable electrode portion and the fixed electrode portion constituting the silicon beam-shaped structure are substantially the same.
- FIG. 4 is an exploded perspective view showing the structure of the acceleration sensor according to the present embodiment.
- the size and shape of each support part of the movable electrode part 22 c and the fixed electrode part 23 c are changed. . This is because changing the size and shape of the support does not affect the characteristics of the sensor.
- the volume charge density of the electrode portion having a small volume increases, and the etching gas passing near the electrode portion having the small volume becomes large. Will give a great repulsion.
- the volume charge density of the electrode portion can be reduced, so that the electrode passes through the vicinity of the electrode portion. It is possible to further reduce the repulsive force applied to the etching gas.
- the silicon device according to the present embodiment is manufactured without performing the etching step (corresponding to the step shown in FIG. 3D) on the back surface of the silicon substrate, and is thinner than the first embodiment, for example, 150
- the configuration is the same as that of the first embodiment except that a silicon substrate of ⁇ is used, and a conductive film is conducted not to the frame but to the supporting portion.
- FIG. 5 is an exploded perspective view showing the structure of the acceleration sensor according to the present embodiment.
- the thickness of the silicon beam-shaped structure 21b and the frame 24b is made thinner than in the first embodiment, and the volume of the support of the movable electrode 22b is fixed to the fixed electrode 23b.
- the structure is larger than the volume.
- FIGS. 6A to 6I show a manufacturing process of the acceleration sensor of FIG.
- a silicon substrate 2 ⁇ thinness: 150 ⁇
- the thermal oxide film 33 on one surface of the silicon substrate 20 is removed with buffered hydrofluoric acid. Since the surface of the silicon substrate 20 from which the thermal oxide film has been removed is not etched, the steps shown in FIGS. 3C and 3D in the first embodiment are unnecessary.
- a lower glass substrate 2 (thickness: 400 ⁇ m) is prepared.
- the surface of the lower glass substrate 2 is photoengraved to form a mask layer 12 made of a resist for forming concave portions.
- hydrofluoric acid 1 hydrofluoric acid 1
- the surface of the lower glass substrate 2 is etched by 20 / m with a 0% aqueous solution to form the recess 3.
- the recess 3 forms a void when the silicon substrate 20 and the lower glass substrate 2 are joined.
- a Cr film is formed by photolithography, and a conductive film 4 made of Cr is formed on the entire surface of the concave portion 3 and on a part of the surface around the concave portion 3. Form.
- the conductive film 4 extending to a part of the periphery of the concave portion 3 forms a conductive portion 5b that is electrically connected to the silicon substrate 20.
- the surface of the lower glass substrate 2 and the surface of the silicon substrate 20 are joined using an anodic bonding method.
- the back surface of the silicon substrate 20 is photoengraved to form a second mask layer 35 made of a resist.
- a thermal oxide film mask 33 ' is formed by the ECR-RIE method.
- the back surface of the silicon substrate 20 is etched by the ICP-RIE method using the second mask layer 35 and the thermal oxide film mask 33 'as a mask. Thereby, the silicon substrate 20 is penetrated to form the beam-like structure 21b and the frame 24b.
- the cantilever 26 b of the movable electrode 2 2 b and the cantilever 31 b of the fixed electrode 31 are opposed to each other with a small gap therebetween, and the small gaps are alternately arranged. It is formed so that wide and narrow are repeated.
- the conductive part 5b is directly joined to the support part 34b of the movable electrode part 22b. After that, the thermal oxide film 33 remaining on the back surface of the silicon substrate 20 is removed by ECR-RIE.
- a concave portion is formed on the surface of the upper glass substrate 6 by the same method as that shown in FIGS. 3E to 3H of the first embodiment.
- a Cr film is formed on the surface of the concave portion by photolithography to form a staking prevention film made of Cr.
- an electrode lead portion formed of a through hole is provided on the upper glass substrate by sandblasting.
- the back surface of the silicon substrate and the front surface of the upper glass substrate are bonded by anodic bonding, and an electrode film made of Pt is formed in the electrode lead portion. Then, the wafer is diced to separate the acceleration sensor.
- the conductive film 4 is joined to the support portion 34b of the movable electrode portion 22b via the conductive portion 5b, and the volume of the movable electrode portion 22b is reduced. It has a structure larger than the volume of the fixed electrode part 23 b. Therefore, compared to the case where the conductive film 4 is bonded to the fixed electrode portion 23 b having a small volume, it is possible to reduce the volume charge density due to the charged positive charges. Further, since an etching step for the back surface of the silicon substrate is not required, it is possible to provide an acceleration sensor excellent in mass productivity.
- the volume of the movable electrode is larger than the volume of the fixed electrode.
- the present invention is not limited to this.
- a conductive film may be bonded to the support portion of the fixed electrode portion by increasing the volume of the fixed electrode portion, or the function may be increased by increasing the volume of the functional portion other than the fixed electrode portion and the movable electrode portion.
- a conductive film can be bonded to the supporting portion of the portion.
- Embodiment 4 As an example of the silicon device according to the present invention, an application example to an angular velocity sensor will be described.
- FIG. 7 is an exploded perspective view showing the structure of the angular velocity sensor
- FIG. 8 is a sectional view taken along line VIII-VIII ′ of FIG.
- the angular velocity sensor 70 includes a silicon beam-shaped structure 71, a frame 74 surrounding the beam-shaped structure 71 with a space therebetween, a lower glass substrate 72 having a concave portion 73 on the surface, And an upper glass substrate (not shown) having a concave portion.
- the beam-shaped structure 71 has two sets of measuring units 90 each including a fixed electrode unit 86 bonded to the lower glass substrate 72 and a movable electrode unit 85 arranged around the fixed electrode unit 86. .
- the two sets of measuring sections 90 are connected to two movable electrode sections 85 by a first elastic connecting member 8.
- the fixed electrode portion 86 forms a comb-like electrode portion of both combs including a base portion 87 and a plurality of cantilever beams 88 arranged at predetermined intervals on both side surfaces in the longitudinal direction of the base portion 87.
- the movable electrode portion 85 is composed of a base portion 76 and a plurality of cantilever beams 77, and two sets of comb electrode portions 75 of a single comb and a beam portion of the two sets of comb electrode portions 75 are formed.
- a vibrating frame 80 supported via 7 9, a first elastic connecting member 8 1 and a second elastic connecting member 7 8 for connecting the vibrating frame 80 to the frame 74 so as to be able to vibrate, These are all integrally formed.
- the two sets of comb-shaped electrode portions 75 are arranged such that the respective cantilever beams 77 face the tips of the cantilever beams 77. Further, in each of the comb-shaped electrode portions 75, the cantilever 77 is arranged on one side in the longitudinal direction of the base portion 76 so that it can face the cantilever 88 of the fixed electrode portion 86 via a small gap. Are arranged at predetermined intervals. Further, a conductive film 84 is formed on the surface of the concave portion 73 of the lower glass substrate 72, and the conductive portion 65 extending around the concave portion 73 is joined to the frame 74.
- the operation principle of the present angular velocity sensor will be described using the coordinate system shown in FIG.
- a desired current is applied to the excitation metal wiring 66 formed on the surface of the first elastic connecting member 81.
- Lorentz force is generated in the X-axis direction, and the movable electrode 85 vibrates in the X-axis direction.
- Corioliska proportional to the magnitude of the angular velocity is generated in the Y axis direction.
- the Coriolisa is used to measure the capacitance between the cantilever of the movable electrode part 85 and the fixed electrode part 86. Detect from change.
- the metal wiring 67 formed on the surface of the second elastic connecting member 78 is for adjusting the current flowing through the metal wiring 66 while constantly monitoring the vibration state of the movable electrode part 85.
- Two sets of movable electrode portions 85, 85 are arranged symmetrically with respect to the first elastic connection member 81, and these vibrate in opposite phases.
- a method is used in which the change in the capacitance of the two movable electrode sections 85, 85 is detected in a differential manner to improve the linearity of the output.
- the metal electrode 68 formed on the surface of the frame 74 is an electrode for grounding, and is for stabilizing the stray capacitance.
- the angular velocity sensor according to the present embodiment has a conductive film that is electrically connected to the frame on the surface of the concave portion of the insulating substrate, and can prevent charging of the insulating substrate during dry etching. it can.
- the comb-shaped electrode portion and the support portion are not eroded, so that a beam-shaped structure having a high shape and dimensional accuracy can be formed, and the reliability is reduced with reduced sensitivity and uneven characteristics of each sensor.
- a high angular velocity sensor can be provided.
- the silicon device of the present invention includes an insulating substrate, a silicon beam-like structure joined by providing a gap between the insulating substrate, and the beam-like structure.
- a frame of silicon bonded to the insulating substrate and bonded to the insulating substrate, wherein the beam-shaped structure is formed integrally with the supporting portion and the supporting portion bonded to the insulating substrate.
- the volumes of the respective functional parts constituting the silicon beam-shaped structure substantially the same, the volume charge density of the functional parts can be reduced even when the overetching time is long. Thus, damage to the beam-like structure during dry etching can be further suppressed.
- the silicon device of the present invention includes a functional part constituting a silicon beam-shaped structure. Since the conductive film formed on the surface of the insulating substrate directly below the cantilever is joined to the support part of the largest volume of the functional part, even if the functional part is charged, Volume charge density due to positive charge can be reduced. As a result, it is possible to provide a silicon device having higher reliability and a degree of freedom in designing a device structure.
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020037002068A KR100665427B1 (ko) | 2001-06-13 | 2001-06-13 | 실리콘 디바이스 |
EP01938625A EP1396727A4 (en) | 2001-06-13 | 2001-06-13 | SILICON DEVICE |
US10/343,963 US6759591B2 (en) | 2001-06-13 | 2001-06-13 | Silicon device |
PCT/JP2001/004987 WO2002103368A1 (en) | 2001-06-13 | 2001-06-13 | Silicon device |
JP2003505633A JPWO2002103368A1 (ja) | 2001-06-13 | 2001-06-13 | シリコンデバイス |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2001/004987 WO2002103368A1 (en) | 2001-06-13 | 2001-06-13 | Silicon device |
Publications (1)
Publication Number | Publication Date |
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WO2002103368A1 true WO2002103368A1 (en) | 2002-12-27 |
Family
ID=11737426
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2001/004987 WO2002103368A1 (en) | 2001-06-13 | 2001-06-13 | Silicon device |
Country Status (5)
Country | Link |
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US (1) | US6759591B2 (ja) |
EP (1) | EP1396727A4 (ja) |
JP (1) | JPWO2002103368A1 (ja) |
KR (1) | KR100665427B1 (ja) |
WO (1) | WO2002103368A1 (ja) |
Cited By (6)
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JP2006349563A (ja) * | 2005-06-17 | 2006-12-28 | Mitsubishi Electric Corp | 慣性力センサ |
JP2009002834A (ja) * | 2007-06-22 | 2009-01-08 | Hitachi Ltd | 角速度検出装置 |
JP2009008437A (ja) * | 2007-06-26 | 2009-01-15 | Dainippon Printing Co Ltd | 角速度センサおよびその製造方法 |
JP2012098208A (ja) * | 2010-11-04 | 2012-05-24 | Seiko Epson Corp | 機能素子、機能素子の製造方法、物理量センサーおよび電子機器 |
JP2015062040A (ja) * | 2015-01-07 | 2015-04-02 | セイコーエプソン株式会社 | 機能素子、機能素子の製造方法、物理量センサーおよび電子機器 |
WO2016103342A1 (ja) * | 2014-12-24 | 2016-06-30 | 株式会社日立製作所 | 慣性センサおよびその製造方法 |
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JP4555612B2 (ja) * | 2004-01-21 | 2010-10-06 | セイコーインスツル株式会社 | 容量型力学量センサ |
US20070034007A1 (en) * | 2005-08-12 | 2007-02-15 | Cenk Acar | Multi-axis micromachined accelerometer |
JP4839747B2 (ja) * | 2005-09-20 | 2011-12-21 | 三菱電機株式会社 | 静電容量型加速度センサ |
US7525205B2 (en) * | 2006-07-28 | 2009-04-28 | Sanyo Electric Co., Ltd. | Electric power generator |
JP2008039593A (ja) * | 2006-08-07 | 2008-02-21 | Alps Electric Co Ltd | 静電容量型加速度センサ |
JP2009216693A (ja) * | 2008-02-13 | 2009-09-24 | Denso Corp | 物理量センサ |
JP5318720B2 (ja) * | 2009-09-30 | 2013-10-16 | 富士通テン株式会社 | 電子制御装置 |
US9476711B2 (en) * | 2013-06-24 | 2016-10-25 | Freescale Semiconductor, Inc. | Angular rate sensor with quadrature error compensation |
JP6562878B2 (ja) * | 2016-06-30 | 2019-08-21 | 株式会社東芝 | 角速度取得装置 |
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- 2001-06-13 EP EP01938625A patent/EP1396727A4/en not_active Withdrawn
- 2001-06-13 JP JP2003505633A patent/JPWO2002103368A1/ja not_active Withdrawn
- 2001-06-13 WO PCT/JP2001/004987 patent/WO2002103368A1/ja not_active Application Discontinuation
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JP2006349563A (ja) * | 2005-06-17 | 2006-12-28 | Mitsubishi Electric Corp | 慣性力センサ |
JP2009002834A (ja) * | 2007-06-22 | 2009-01-08 | Hitachi Ltd | 角速度検出装置 |
US8327706B2 (en) | 2007-06-22 | 2012-12-11 | Hitachi, Ltd. | Angular velocity detecting device |
US20130152682A1 (en) * | 2007-06-22 | 2013-06-20 | Hitachi, Ltd. | Angular velocity detecting device |
US8616058B2 (en) | 2007-06-22 | 2013-12-31 | Hitachi, Ltd. | Angular velocity detecting device |
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WO2016103342A1 (ja) * | 2014-12-24 | 2016-06-30 | 株式会社日立製作所 | 慣性センサおよびその製造方法 |
JP2015062040A (ja) * | 2015-01-07 | 2015-04-02 | セイコーエプソン株式会社 | 機能素子、機能素子の製造方法、物理量センサーおよび電子機器 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2002103368A1 (ja) | 2004-10-07 |
KR20030027950A (ko) | 2003-04-07 |
US6759591B2 (en) | 2004-07-06 |
EP1396727A4 (en) | 2009-06-17 |
US20030180504A1 (en) | 2003-09-25 |
KR100665427B1 (ko) | 2007-01-04 |
EP1396727A1 (en) | 2004-03-10 |
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